Burglar-alarm



UNITED STATES ATENT OFFICE.

HIRAM HERRIOK AND VILLIAM L. BABCOOK, OF TOLEDO, OHIO.

BURGLAR-ALARIVI.

SPECIFICATION forming part of Letters Patent No. 323,810, dated August4, 1885.

Application filed March 24, 1885.

T all whom it may concern:

Be it known that we, HIRAM HnnnrcK and WILLIAM L. BABcocK, both citizensof the United States, residing at Toledo, in the county ofLucas andState of Ohio, have invented new and useful Improvements in Burglar-Alarms, of which the following is a specification.

Our invention relates to that class of improved burglar-alarms in whichthere isa simple, compact, and complete alarm movement, secured in ametallic case of suitable size and shape,and havinga pivoted lid workingin connection with the alarm movement and operated by Contact with adoor or window, as hereinafter more clearly described; and the object ofour invention is to produce a burglar-alarm cheap and simple in itsconstruction, and easily attached and operated in connection with a dooror window. l/Ve attain these objects by the mechanism illustrated in theaccompanying drawings, in which- Figure 1 is a perspective view of theentire device. Fig. 2 is a side view of the device with the lidraised,and showing` in dotted lines the position of the alarm movement.'Fig. 3 is a back end view showing the lid raised. Fig. 4 is a side viewof the alarm movement, with a section of the lid, showing the stoppin.Fig. 5 is a top view ofthe alarm movement, in all of which views likeletters refer to like parts.

A is a metal case, to which a lid, B, is attached by pivots b b, andhaving a raised wedge-like projection, C, forming an incline plane,against which the door or window acts, to let o'I" the alarm. The dooror window, pressing against theincline plane C, forces the lid down atthe front end and compresses the spring D, at the same time raising theback end of the lid B, allowing the stop and spring E to come intoposition and retain the lid B open.

F F are two or more sharp sloping projections that engage .in the flooror carpet and prevent the device from being forced back by the pressureof the door or window against F is a foot on which the front end of thedevice rests when it is not placed so as to rest on the threshold. G G,8mo., are projections (Model.)

forming guards to protect the winding-stem and bar B.

In the alarm-movement I I are lower and the posts and pins J J. To theturned-up end of the lower plate, I, is secured the bell H. Between theplates I I are arranged on the shaft q a spur-wheel, N, ratchet I),spring S, and on a second shaft a pinion or lantern wheel m to engage inthe spur-wheel N, and an escapcment-wheel, M, to work in connection witha pallet, K, on a rocking shaft, J', to which is secured a striking-arm,L. A stoppin, Z, on the lid B is arranged to lock the striking-arm Lwhen the lid is down and the alarm is wound up,which is done by thewinding-bar R.

T T form guide-pins to retain the movement in position in the case A,and a screw, V, through the bottom of the case Aholds it fast.

Having described the parts of our invention its operation may be easilyunderstood, as follows: Close the lid B, as shown in Fig. l; then bymeans of the bar R wind up Athe alarmmovement; place the case A on thefloor close up to the bottom of the door, so that the incline plane C onthe lid B will come in contact with the door when opened and press thecase A down, so that the sharp projectionsF F enter the ldoor; then whenthe door is forced open against the inclined plane C the forward end ofthe lid B is pressed down and the back end raised,which also raises thestop-pin Z and releases the striking-arm L, and the alarm goes off, thestop and spring E retaining the lid B open. In a similar manner Wedesign to use it in connection with a window.

Having thus described our invention and its manner of working,what weclaim as new, and desire to secure by Letters Patent, is-

l. In a portable burglar-alarm, a case, A, with its sharp projections FF, foot F', and guard-projections G G, 85o., in combination with apivoted lid, B, pivots b b, incline plane C, and stop-pin Z, retained indesired position by the springs D and E, as described and specied.

2. In a portable burglar-alarm,the combination of a case,A, lid B,pivots b b, incline plane C, springs D and E, stop-pin Z, sharp slopingprojections F F, foot F', guard-projections G upper plates,connectedtogether by means of 5 5 IOO G, with the alarm-movementconsisting of ourhfmds in the presence 0f two Sul'iseribing plates I I,bell H, shaft Q, bzuR, spur-Wheel N, witnesses.

ratchet l), spring S, pinion m, escapement- HIRAM HERRTCK.

Wheel M, pallet K, rocking shaft J', striking- XVILLIAM. L. BABCOCK. 5arm L, guide-pins T T, and screw V, as de- Witnesses:

scribed and specified. J. T. GREER,

In testimony whereof We have hereunto set MTM. H. TUCKER.

